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カーニヴァル
Nai searches for someone important to him, with only an abandoned bracelet as a clue. Gareki steals and pick-pockets to get by from day to day. The two meet in a strange mansion where they are set-up, and soon become wanted criminals by military security operatives. When Nai and Gareki find themselves desperate in a hopeless predicament, they encounter none other than the country's most powerful defense organization - "Circus"!!
With Yotaka gone, Gareki and Tsubame are left to pick up the pieces and make sense of what has happened.
Now that Nai knows Karoku's bracelet has something to do with Circus, he goes in search of answers, but he finds that his earlier brush with trouble is far from over.
While under Circus's protection, a curious fact comes to light regarding Nai's true identity. With that clue in hand, Nai, Gareki, and several members of Circus pay a visit to where they believe Nai came from.
After their trip to Rainbow Forest, Gareki asks to drop by Karasuna, where they run into an old acquaintance of his. From this enounter, Nai and Yogi learn more about Gareki's past.
Yotaka has become a Varuga. Meanwhile Gareki feels very conflicted about his past with Yotaka and Tsubame.
With Yotaka gone, Gareki and Tsubame are left to pick up the pieces and make sense of what has happened.
Team Two is helping Team One put on their Circus parade and show, and Yogi gets Nai and Gareki to join the parade in an effort to cheer up Gareki. But a malfunctioning Team One rabbit throws a wrench into their festivities.
Yogi and Tsukumo are sent on a mission to Rinole, the City of Ice, to follow-up an investigation started by Team One. Nai and Gareki are sent along with them, and the four of them find more than they bargained for.
Yogi going berserk sends the bad guys running, but when Nai senses that something is wrong with him, Tsukumo turns back alone, only to run into trouble herself.
With Yogi and Tsukumo out of commission, Nai and Gareki are put into the care of Airship One. Meanwhile Gareki learns more about special powers.
Hirato and Tsukumo take a meeting with the CEO of the Lindain Group in Vantnum while the rest of the gang gets the day off. The CEO has disturbing news, but a boy they run into in the city has even more intriguing information.
Nai is determined to go to the Kafka facility to rescue Karoku. Soon the Circus decides to use this as an excuse to raid the facility.
As Nai and Gareki make their way towards the mysterious rainbow to see if Karoku is there, the rest of Circus work to wrap up what they can of the raid on the Kafka facility.
